1. The problem statement, all variables and given/known data An LTI discrete-time system has frequency response given by (a) Use one of the above forms of the frequency response to obtain an equation for the impulse response h[n] of the system. (b) From the frequency response, determine the difference equation that is satisfied by the input x[n] and the output y[n] of the system. (c) If the input to this system is x[n]=4+2cos(won) for oo<n<oo, for what value of wo will the output be of the form y[n] =A constant for -00 < n < oo? What is the constant A? 2. The attempt at a solution (a) i found to be h[n] = (0.8)^n u[n] + (0.8)^n-2 u[n-2] Can anyone help me with the rest of the two parts?